Advanced Instruments 3300, User Manual

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[START] soft key to start the displayed test; the [INDEX] soft key to
display the next menu item; or both soft keys simultaneously to exit
from the menu.
4. If you choose to press the [START] soft key, execution of the cho-
sen function may require the use of either of the soft keys for further
selections, as designated below. To end any function and return to
the menu, press both soft keys and release them simultaneously.
5. You may then use [INDEX] to index to another item on the menu or
press both soft keys and release them simultaneously to exit from the
diagnostic menu to
“
Osmometer Ready
”
.
Any instructions necessary for the menu function started are provided
on the display. A description of each menu item follows:
A/D Test
This set of tests may be used to test the block probe, the sample-cooling
assembly, or the sample probe.
On entry, the A/D tests display the target sample cooling block tempera-
ture, the channel being read, and the current channel reading or duty
cycle. The display is in the form,
“ off Blk NNNN.NN ohm ” , where
“ off ” indicates that a target temperature has not yet been selected, “ Blk ”
indicates that the block probe channel is being tested, “ NNNN.NN ” is a
numeric readout of the probe and “ ohms ” indicates the units of the read-
out. These readings are updated continuously.
Pressing the left function soft key sequentially changes the target cool-
ing block temperature from
“ off ” to “ +1 ” °C, to “ 0 ” °C, to “ -1 ” °C, to
“ -2 ” °C, to “ -4 ” °C, to “ -8 ” °C, to “ -12 ” °C, to “ off ” , etc.
Pressing the right function soft key sequentially changes the channel
and readout units from probe resistance in ohms, to probe temperature
in tenths of a degree Celsius, to cooling-block duty cycle (
“
NN%
”
on)
to probe resistance in ohms, etc.
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Troubleshooting & Service